Displaying 2 results from an estimated 2 matches for "2logq".
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2006 Feb 09
1
glmm.admb - bug and possible solution??
...andom=~1,
group="table", data=bm, family="binomial", link="logit")
anova(m1, m1.1)
I get the following output with the warning
Analysis of Variance Table
Model 1: survival ~ light * species * damage
Model 2: survival ~ (light + damage + species)^2
NoPar LogLik Df -2logQ P.value
1 9.000 -103.307
2 9.000 -103.781 0 -0.948
Warning message:
NaNs produced in: pchisq(q, df, lower.tail, log.p)
The warning is generated because the df=0. This appears to be because
the number of parameters is being incorrectly calculated (they should be
9 and 8 respectively). I had a loo...
2009 Jan 07
0
fixed effect significance_NB mixed models_further pursuit
...ated model has 0 degrees of freedom
(because the same number of parameters is estimated for both the
reduced and the saturated model); as in the output below:
Model 1: glmm.admb(fixed = y ~ b1 + I(b2^2) + b1:b2?
Model 2: glmm.admb(fixed = y ~ b1 + b2 + I(b2^2) + b1:b2?.
NoPar LogLik Df -2logQ P.value
1 10.00 -190.66
2 10.00 -190.66 0 0.00 0.00
I thought this outcome might arise because the program might
automatically implement a ?heredity? rule (see R-sig-mixed models list
serv: A. Robinson, 1 Mar. 07), whereby if an interaction is included
in a model, all lesser comp...